3 ms·

I wonder what they mean by this: APOUT: AND #$7F ;eat Apple idiot char codes, type Ascii JMP COUT did the Apple II not use ASCII?

• tomtomtom777 8y ago
  Apple II did use ASCII. But ASCII defines 128 code-points. The other 128 code-points are specific to the character encoding or "codepage". They don't like Apple's "idiot" character encoding (which is custom, Apple II specific), so they throw away the top bit with the AND leaving only ASCII characters.
  • dragonwriter 8y ago
    > But ASCII defines 128 code-points. The other 128 code-points are specific to the character encoding or "codepage". ASCII is a character encoding, and it's a 7-bit encoding. It has no code pages. There are many 8-bit encodings / code pages that are ASCII supersets (including the Apple II one), however.
    • tomtomtom777 8y ago
      Yes. I meant to the "8-bit character encoding" but I think it's clear from the context.